Experimental Study of Split Grouting Reinforcement Mechanism in Filling Medium and Effect Evaluation

被引:30
作者
Niu, Jiandong [1 ]
Li, Zewei [1 ]
Gu, Weiheng [1 ]
Chen, Kang [1 ]
机构
[1] Cent South Univ, Sch Civil Engn, Changsha 410075, Peoples R China
基金
国家重点研发计划;
关键词
effect evaluation; experiment; filling; grouting veins; mechanism; reinforcement; split grouting; TUNNEL; CEMENT; FLUID;
D O I
10.3390/s20113088
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
In view of the deficiency of the split grouting theory for the filling area, a 3D simulated grouting test system was designed to explore the slurry diffusion law, reinforcement mechanism of split grouting in a filling soil, and effect of grouting reinforcement. The test system included an experiment bench system, grouting system, and information monitoring system, using which experimental research on split grouting in a filling soil was conducted. The grouting model experiment procedure was introduced first, following which the diffusion rule of slurry in the filling medium and the reinforcement mechanism of split grouting were analyzed according to the properties and distribution characteristics of grouting veins after grouting reinforcement. Finally, a uniaxial compression test, light dynamic contact test, permeability test, and laboratory geotechnical test were conducted on the soil before and after grouting. The relationship between the zoning characteristics of different properties of veins and the mechanical properties of filling soil were discussed. The results showed that there were three types of grouting veins: trunk grouting, branch grouting, and permeable grouting. The injected soil body was strengthened by the three-stage grouting vein network of the mentioned vein types and the compaction between soils. After the grouting, the uniaxial compressive strength of the filling soil increased by an average of 186%, and the permeability coefficient decreased by an average of 47 times. The cohesion and internal friction angle increased by 45.3% and 44.9%, respectively. Additionally, density, water content, and other indicators of filling were improved. The bearing characteristics reflected by a dynamic contact test were consistent with the distribution of grouting veins. The research results offer significant guidance for the reinforcement mechanism of split grouting and the evaluation of the grouting effect.
引用
收藏
页数:19
相关论文
共 25 条
  • [1] Micromechanical investigation of grouting in soils
    Boschi, Katia
    di Prisco, Claudio Giulio
    Ciantia, Matteo Oryem
    [J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 2020, 187 : 121 - 132
  • [2] Cheng Pan, 2013, Journal of Central South University (Science and Technology), V44, P3800
  • [3] Integrated Investigation for Geological Detection and Grouting Assessment: A Case Study in Qingdao Subway Tunnel, China
    Guo, Qian
    Pang, Yonghao
    Liu, Rentai
    Liu, Bin
    Liu, Zhengyu
    [J]. JOURNAL OF ENVIRONMENTAL AND ENGINEERING GEOPHYSICS, 2019, 24 (04) : 629 - 639
  • [4] Numerical simulation and field test of grouting in Nong'an pilot project of in-situ conversion of oil shale
    Guo, Wei
    Zhang, Miao
    Sun, Youhong
    Li, Qiang
    Zhao, Shuai
    Deng, Sunhua
    [J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2020, 184
  • [5] Experimental investigation of the fracture grouting efficiency with consideration of the viscosity variation under dynamic pressure conditions
    Han, Chenghao
    Zhang, Weijie
    Zhou, Wenwu
    Guo, Jianbin
    Yang, Fei
    Man, Xiaoquan
    Jiang, Jigang
    Zhang, Chunrui
    Li, Yongjie
    Wang, Zheng
    Wang, Hao
    [J]. CARBONATES AND EVAPORITES, 2020, 35 (02)
  • [6] 考虑渗滤效应的砂土介质注浆扩散规律研究
    李术才
    冯啸
    刘人太
    张乐文
    韩伟伟
    郑卓
    [J]. 岩土力学, 2017, 38 (04) : 925 - 933
  • [7] Experimental Study on the Reinforcement Mechanism of Segmented Split Grouting in a Soft Filling Medium
    Li, Zhipeng
    Li, Shucai
    Liu, Haojie
    Zhang, Qingsong
    Liu, Yanan
    [J]. PROCESSES, 2018, 6 (08)
  • [8] Ultrasonic Detection Method for Grouted Defects in Grouted Splice Sleeve Connector Based on Wavelet Pack Energy
    Li, Zuohua
    Zheng, Lilin
    Chen, Chaojun
    Long, Zhili
    Wang, Ying
    [J]. SENSORS, 2019, 19 (07)
  • [9] Lin CJ, 2020, KSCE J CIV ENG, V24, P278
  • [10] Predicting of the Unit Grouting Quantity in Karst Curtain Grouting by the Water Permeability of Rock Strata
    Niu, Jian-Dong
    Wang, Bin
    Chen, Guan-Jun
    Chen, Kang
    [J]. APPLIED SCIENCES-BASEL, 2019, 9 (22):